数字短波阵列天线的时钟同步算法

A clock synchronization algorithm for digital HF antenna array

针对阵列天线端数字采样时钟的同步问题,提出一种高精度的时钟同步算法。在PTP同步协议的基础上,通过对时钟脉冲的上升沿和下降沿检测提高时间戳精度。基于FPGA设计了以双边沿检测算法为核心的时钟同步电路,并搭建仿真平台对算法进行验证。仿真结果表明,该算法能对短波阵列天线输出的阵列信号进行高精度的同步采样。

Aiming at the sampling clock synchronization in HF antenna array,a high-precision clock synchronization algorithm is proposed.Based on the analysis of PTP,the accuracy of the time stamp is improved by detecting the rising and falling edges of the clock pulse.Then a clock synchronization circuit is designed based on FPGA,and a simulation platform is built for verification.The simulation results show that the algorithm leads to high-precision synchronous sampling for HF antenna array.